期刊
SYNTHETIC METALS
卷 268, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.synthmet.2020.116483
关键词
Wearable supercapacitor; Self-discharge; Charge redistribution; PEDOT; Polymer energy storage; Oxidative chemical vapor deposition
资金
- National Science Foundation [CBET 1706633]
Despite the many efforts put toward developing flexible supercapacitors for wearable technology, few studies have focused on self-discharge, the spontaneous voltage decay of devices stored in their charged state. In this work, we characterize the self-discharge behavior of an all-textile supercapacitor utilizing oxidative chemical vapor deposited (oCVD) PEDOT-Cl electrodes. A significant portion of the voltage losses are found to arise from charge redistribution, a physical process involving the rearrangement of charges within the electrode material. Two means of mitigating this mode of self-discharge are presented. A post-charging hold step improves voltage retention by enabling spatially-uniform charge distribution within the electrode. Improving the ordering of polymer crystal domains via control over the polymer growth temperature during oCVD is also found to impact the self-discharge rate. Electrochemical and morphological characterizations of films grown at high and low temperature indicate that more ordered polymer films exhibit less self-discharge due to charge redistribution, perhaps a result of greater charge accessibility throughout the film. These results, including improved charging protocols and material optimizations, may help pave the way for practical, lightweight charge storage devices to power wearable electronics.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据